A prom send-off is one of those events that sneaks up on you. Between the dress, the flowers, the dinner reservation, the photos, and the actual decor at your house, $600 can disappear before the corsage is pinned on. And because the date is fixed by the school calendar, there is no wiggle room once May hits.
The good news is that most of these costs are deadline purchases, which means timing is the lever. Book the stuff that fills up first, leave the flexible stuff for later, and you can spread the bill across months instead of scrambling in April. Below is a short playbook for doing exactly that.
One honest note: a 0% intro window is a deadline, not a discount. The Citi Simplicity charges 0% for 18 months on purchases from the date of account opening, and after it ends, the remaining balance starts accruing interest at the card's regular rate. So set the autopay to clear the full $600 before month 18, and check the balance every few months so you are not caught off guard.